#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright 2021 Tianmian Tech. All Rights Reserved.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Copyright 2019 The FATE Authors. All Rights Reserved.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.



import abc


class Promoter(object):
    @abc.abstractclassmethod
    def compute_intermediate(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")

    @abc.abstractclassmethod
    def aggregate_host_result(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")

    def compute_gradient_procedure(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")


class Provider(object):
    @abc.abstractclassmethod
    def compute_intermediate(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")

    def compute_gradient_procedure(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")


class Arbiter(object):
    def compute_gradient_procedure(self, *args, **kwargs):
        raise NotImplementedError("This method should be be called here")
